Draft-gear.



1. F. CGURSON.

DRAFT GEAR. APPLICATION FILED FEIsfI. IQI?.

Pawnted sept. 3 ,1918

80eme e 0m` bar and unirsi) STATES PATENT orrion.

or fireman,

JOHN F. CO'UBISON,

PENNSYLVANIA.

DRAFT-GEAR.

tion of the arrangement between. the side the casing Specification of Letters Patent.

inner faces thereof are friction preferably in an assembled segmental shaped g Patented Sept. 3, 1918. Application filed February 15, 1917. Serial No. 148,719. Y, To all whom it may concern: u y Y ln the drawings, 2 represents the draw Be it known that l, JOHN F. GOURSON, a bar of a couplerv connected .with the side citizen of the United States, residing at Pitbars 3, 3, by a transverse key 4 which passes cairn, in the countyof Allegheny and State through the draw bar and through .longiof Pennsylvania, have invented certain new lldklally arranged kSlots 5, 5, yof balls 3 and useful improvements in Draft-Gears, Slots 51 are provided for clearance ofkey 4 60 of which the following is a specification.- 1n bufng and for key 6 in pulling, the bars My nvention is an improvement in draft Y 3 positively engaging the lugs of the casing, gears for railway cars, etc., and it has vfor as hereinafter described. its object to provide Ya draft gear utilizing l Key 6 extends transversely through slots friction and spring resistance, of simple con- 7, 7 of the center sillsk 8 andbears for-y 65 struction ,and` high efficiency, designed to wardlyagainstvthe sills and abutment stops utilize the wedging `and releasing action of 9, 9,l thereof, providing a rigid bearing 'for wedge blocks arranged between a central the central we ge 10 in pulling. Saidwedge buifing member and surrounding friction is referably provided with a transverse members an inclosing Openkended casing, a middle SlOtted portion, through Which key spring, and mechanism mounted within the 6 passes, the wedge extendinglover kthe key carframe and so connected with the draw above and below and providing a good supbar as to transmit bui'ring and pulling strains porting bearing for mounting the wedge in Y tothe car underframe. ntlalposition. f f Y n f rlhe objects in view are to provide, in a The friction receiving member of the gearY 75 gear of this class, for easy mountin within is a casing11, generallycylindrical in form, the car frame, a direct connection with the preferably having ra slight taper, inwar ly draw bar by means of slotted straps or lugs, toward its rear enk and in the main conoperating in connectionwith keys an istruction being provided with laterally eX- rectly engaging the casing for forward tending ears or lugs 12v, 12. 80 movement from normal position and return- Y These lugseXtend through or into sockets ing itthereto at the termination of pulling 5 of bars 3, 'the bars thus embracing the strains.- f v Y f j lugs Vand holding the casingin normal posi- Preferred constructions of the invention, tion, being adapted to transmit forwar including the several detail parts, are more movement to it in pulling, and rto retract it ,55 fully hereinafter ,described an illustrated to normal position in releasin'g'after pulling in the accompanying drawings, in whichstrains, The rear end Vportions of` thebars" 3 Figure 1 is a longitudinal vertical secare-provided with a transverse key 13 which y tional view of a complete gear as assem e bears in normal position backwardly against' indicated by the vsectionline 1,1, of Fig, 2, a transverse abutment 14 which is riveted f90 the parts being `shown in 'normalextende or otherwise secured betweenk the center position. v y SillsiS. f l Y Fig.12i`is a horizontal sectional view indin Abutment 14 is provided with a slotted cated by the Vline 11,11, of Fig. 1. n housing 15 between the upper yand, lower Fig. 3 isa cross-sectional view indicated sidesof which the key 13 moves forwardly 95 by the line Ill, llL'of Fig. 1. v .n v v l in pulling, and'in which it seats in buffng,

, Fig. 4 isa view similarto Fig. l, but in as will be readily understood. y' sectional construction on the line lV, IV of Housing portion l15falso provides by its Fig. 2, showing he parts in compression, front faces a bearing for spring plate 16, under pulling strains, Y 3; which also has a slotted engagement with 11 Fig. 5 is a detail perspective view ofthe the front edge portion of key 13, and by casing detached. f f which the spring plate is pressed forwardly .Fig. 6 is asimilar view of the apertured in pulling, as in i 4. lnnormal position` L cross-head mounted between the center sills. yas in Figs..1 andy 2,'the spring plate seats Fig. 7 is a partial sectional: view similar backwardly against the housing 1 Y. -1 to Fig. 2 but showing a modified` construc- Within thecasing- 11 and ,engaging the j one side sill `to the other is also with the spring friction shoes or expanding vby its fi'ont ing 11.

Between the rear ends of shoes 17 and spring plate 16 is interposed a spring or springs22, 22". re spring resistance, by these elements, may be' varied" to suit the conditions of use, and either a single spring of .the desired strength, or a plurality of tively stationary friction shoes 17 in pulling, or between the rearwardly moving friction shoes and' the relatively stationary key 3 and abutmentlt in bulinO'. f

casingll, and providing a rigid for the casing in normal position,y and during bufng strains, 1 providethe apertured cross-head 23, shown in detail in Fig. 6; i thecentcr sills and is fixedly bolted or otherwise secured thereto,y and is provided ywith a central 'clearance opening 24 for the spring or springs 22, 2 and l at each side thereof with clea 1ance openings 25,725, for

e side bars v3, A3. I ,Y y `he cross-head xedly braces thevcenter sil s, provides a bearing abutment for the casing, and a mounting for the side bars and springs.. 't ,i K

Alower plate 26 extendingacross from provided for supporting the casing 11, in connection with the engagement of lugs 12 with the slotted side bars.

n Fig. IV show a somewhat modified constructionkin which the lugs 12 of the casing are omitted, leaving it continuously cylindrical on the exterior,land the side bars 3' are provided with attached lugs or abutments 12a, 12', which bear directly against tie rear and front end -portion of the casing 1 at each side. Y

1n such construction the cross-head 23 is omitted, the ing thebufling'tlirust.

n operation, the gear iseective to generate a high degree of resisting friction either in bu by expansion of the friction shoes 1f andv their frictional engagement with the casing 11, in connection wedges 20, and between K ars 3? and rear lugs12?t tak-v therefore are operapractically the entire interior of the casing, their action being' subpulling or buffing movements.

',hiis in bufling, rearward movement of vthe draw bar yand corresponding inward movement of wedge 10 distend rthe wedge and friction elements and' will move them stationary remaining stacasing 11, the side fs 4f and' G passing backtionary and key draw bar 2 and key t will' upon side bars 3 which in turn, by ley 13 and spring plate 'compress spring 22, the casing 11 ei-iig simultaneously carri-'ed forward by its engagement with the bars 3.

Central' wedge 1'0, being' resisted by key 6, will exert expanding and resisting action against the wedge and friction shoe mechanism, generating friction between the shoes Upon draft gear consisting of a tubular casing, ra bearing abutment therefor, friction shoes within tie casing, a central pressure ar, an abutment therefor, a drawbar operatively related to the pressure bar, and means opera ble to exert tion shoes through tl ing toward the pressure bar and connected he casing and drawbar.

draftl gear consisting of a tubular casing, a bearing abutment therefor, Ifriction shoes within the casing, a central pressure ar, an abutment therefor, a drawbar voperatively related to the pressure bar, a forwardly movable abutment, a spring inserted between said abutment and the friction shoes, and side bars connected with said abutment and' the drawbar and having positive engagement with the casing.'

a e rear abutment and ended casing, bearing tion creating mechanism engaging the f ment bet means connecting the rear abutment with the drawbar and having positive engagement with the casing.

5. In combination with car framing, a transverse apertured abutment, a casing engaging said abutment, friction creating mechanism within the casing embodying a central pressure bar, a forward abutment for saidbar, a rear abutment and a forwardly movable key, a spring between said key and the friction mechanism, a drawbar, and slotted side bars connecting said key with the drawbar and engaging the casing on either'movement.

6. In combination with car framing, a rear abutment, a rear transverse key seating against said abutment, a forward key having slotted engagement with the car framing and engaging against abutments thereof, an intervening transverse abutment,

a tubular casing in front of said abutment,

friction creating mechanism within said casing, a central wedge therefor engagingsaid forward key, a spring between the friction mechanism and the rear key, and side bars connecting the rear key with the drawbar and having forward and backward engagesignature.

JOHN F. COURSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner o! latents, Washington, D. C." 

